/*
 * Copyright 2016 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "include/core/SkCanvas.h"
#include "modules/svg/include/SkSVGRenderContext.h"
#include "modules/svg/include/SkSVGTransformableNode.h"
#include "modules/svg/include/SkSVGValue.h"

SkSVGTransformableNode::SkSVGTransformableNode(SkSVGTag tag) : INHERITED(tag), fTransform(SkMatrix::I()) {}


bool SkSVGTransformableNode::onPrepareToRender(SkSVGRenderContext *ctx) const
{
    if (!fTransform.isIdentity()) {
        ctx->saveOnce();
        ctx->canvas()->concat(fTransform);
    }

    return this->INHERITED::onPrepareToRender(ctx);
}

void SkSVGTransformableNode::onSetAttribute(SkSVGAttribute attr, const SkSVGValue &v)
{
    switch (attr) {
        case SkSVGAttribute::kTransform:
            if (const auto *transform = v.as<SkSVGTransformValue>()) {
                this->setTransform(*transform);
            }
            break;
        default:
            this->INHERITED::onSetAttribute(attr, v);
            break;
    }
}

void SkSVGTransformableNode::mapToParent(SkPath *path) const
{
    // transforms the path to parent node coordinates.
    path->transform(fTransform);
}

void SkSVGTransformableNode::mapToParent(SkRect *rect) const
{
    *rect = fTransform.mapRect(*rect);
}
